Shikaku

Shikaku (also known as Rectangles) is a logic puzzle with simple rules and challenging solutions.

The rules are simple. You have to divide the grid into rectangular and square pieces such that each piece contains exactly one number, and that number represents the area of the rectangle.

Click and drag to draw a rectangle. To remove lines use the right mouse button or hold the Ctrl or the Shift key.

Video Tutorial

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This Month
1.	kinbo71	00:05.95
2.	kroller	00:06.35
3.	RaiT	00:06.54
4.	vilodi	00:06.56
5.	keehaag	00:06.59
6.	hayei	00:06.96
7.	gh	00:07.66
8.	qobi	00:08.22
9.	MadraMor	00:08.59
10.	Richrrad	00:08.93
11.	GeorgPfleger	00:09.19
12.	zhanglin1982	00:09.51
13.	Emzed	00:10.15
14.	venipede	00:10.77
15.	Emberana	00:10.84
16.	Fjznbeinfnn	00:11.46
17.	HDXX123456789	00:11.57
18.	Green.wolf._	00:12.48
19.	pato3042	00:13.09
20.	camy9210	00:13.15

This Week
1.	kinbo71	00:05.95
2.	kroller	00:06.35
3.	keehaag	00:06.59
4.	gh	00:07.66
5.	qobi	00:08.22
6.	Emzed	00:10.15
7.	GeorgPfleger	00:10.36
8.	HDXX123456789	00:11.57
9.	rob69	00:14.94
10.	yasuyo	00:17.68
11.	imjoevegas	00:21.26
12.	Tobias Matthews	00:23.48
13.	MahjongLyonnais	00:27.59
14.	Dorice	00:31.14
15.	FunAcroFly	00:37.18
16.	--- empty ---	--:--
17.	--- empty ---	--:--
18.	--- empty ---	--:--
19.	--- empty ---	--:--
20.	--- empty ---	--:--

Today
1.	imjoevegas	00:21.26
2.	--- empty ---	--:--
3.	--- empty ---	--:--
4.	--- empty ---	--:--
5.	--- empty ---	--:--
6.	--- empty ---	--:--
7.	--- empty ---	--:--
8.	--- empty ---	--:--
9.	--- empty ---	--:--
10.	--- empty ---	--:--
11.	--- empty ---	--:--
12.	--- empty ---	--:--
13.	--- empty ---	--:--
14.	--- empty ---	--:--
15.	--- empty ---	--:--
16.	--- empty ---	--:--
17.	--- empty ---	--:--
18.	--- empty ---	--:--
19.	--- empty ---	--:--
20.	--- empty ---	--:--

MO3
1.	zahhydude1	00:03.48
2.	vowels	00:03.81
3.	demian2	00:04.66
4.	Vicellen	00:04.70
5.	coolcoolguy65	00:05.06
6.	BingBongBob	00:05.15
7.	JZE	00:05.16
8.	numbrr	00:05.20
9.	nabi	00:05.27
10.	mtanzer	00:05.34

AO5
1.	zahhydude1	00:03.76
2.	vowels	00:03.88
3.	demian2	00:04.92
4.	Vicellen	00:05.06
5.	numbrr	00:05.32
6.	BingBongBob	00:05.39
7.	nabi	00:05.41
8.	bearn	00:05.55
9.	JZE	00:05.75
10.	coolcoolguy65	00:06.01

AO12
1.	zahhydude1	00:04.54
2.	vowels	00:04.91
3.	BingBongBob	00:05.84
4.	Vicellen	00:06.24
5.	numbrr	00:06.26
6.	demian2	00:06.31
7.	JZE	00:06.39
8.	bearn	00:06.41
9.	coolcoolguy65	00:06.66
10.	nabi	00:06.91

Robots / programmatic solvers		info
1.	tlstyer	00:00.006
2.	Charlie Li	00:00.207
3.	Paul Bismuth	00:01.692

* MO3 - Mean of 3. The average of 3 consecutive times.
AO5 - Average of 5. The average of 5 consecutive times ignoring the highest and the lowest.
AO12 - Average of 12. The average of 12 consecutive times ignoring the highest and the lowest.
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2026-01-20 13:20:24

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